Hi all,<div><br></div><div>We wrote several months ago a quick overview about how to oversubscribe with StackOps Enterprise Edition. Surprisingly it was a presentation our customer they love :-o</div><div><br></div><div>Here goes the presentation in slideshare:</div>

<div><a href="http://www.slideshare.net/stackops/stackops-openstack-nova-sizing-service-definition">http://www.slideshare.net/stackops/stackops-openstack-nova-sizing-service-definition</a></div><div><br></div><div>Cheers</div>

<div>Diego<br clear="all"> -- <br><span style="border-collapse:separate;font-family:Times"><span style="border-collapse:collapse;font-family:arial,sans-serif"><div align="left" style="font-size:13px"><div><font><span lang="ES" style="font-family:Arial">Diego Parrilla<br>

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</b></a></font></div></div><div style="font-size:13px"><font color="#004438" face="Arial"><b><p><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><span style="border-collapse:separate;font-family:Times;font-size:medium"><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px"><font color="#004438" face="Arial"><b><b><span lang="EN-GB" style="font-size:10pt"><img src="http://stackops.s3-external-3.amazonaws.com/STACKOPSLOGO-ICON.png"></span></b></b></font></span></span></span></span></p>

</b></font></div></span></span><div><br></div><br>
<br><br><div class="gmail_quote">On Fri, Sep 21, 2012 at 4:39 PM, Samuel Winchenbach <span dir="ltr"><<a href="mailto:swinchen@gmail.com" target="_blank">swinchen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">

Hi All,<br>
<br>
What are some "best practices" when it comes to overselling RAM in a<br>
KVM based openstack setup?  For example:<br>
<br>
I have 4 nodes with 16 cores & 128 GB RAM each.  If on one of those<br>
nodes I oversell ram 2:1 (256 GB RAM) and the VMs actually use that<br>
much does it just start swapping out pages to disk?<br>
<br>
How do all of you handle overselling RAM?<br>
<br>
Thanks,<br>
Sam<br>
<br>
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</blockquote></div><br></div>